<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2012 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id: Model.class.php 2779 2012-02-24 02:56:57Z liu21st $

/**
 +------------------------------------------------------------------------------
 * ThinkPHP 精简模式Model模型类
 * 只支持CURD和连贯操作 以及常用查询 去掉回调接口
 +------------------------------------------------------------------------------
 * @category   Think
 * @package  Think
 * @subpackage  Core
 * @author    liu21st <liu21st@gmail.com>
 * @version   $Id: Model.class.php 2779 2012-02-24 02:56:57Z liu21st $
 +------------------------------------------------------------------------------
 */
class Model {
	// 操作状态
	const MODEL_INSERT      =   1;      //  插入模型数据
	const MODEL_UPDATE    =   2;      //  更新模型数据
	const MODEL_BOTH      =   3;      //  包含上面两种方式
	const MUST_VALIDATE         =   1;// 必须验证
	const EXISTS_VAILIDATE      =   0;// 表单存在字段则验证
	const VALUE_VAILIDATE       =   2;// 表单值不为空则验证

	// 当前数据库操作对象
	protected $db = null;
	// 主键名称
	protected $pk  = 'id';
	// 数据表前缀
	protected $tablePrefix  =   '';
	// 模型名称
	protected $name = '';
	// 数据库名称
	protected $dbName  = '';
	// 数据表名（不包含表前缀）
	protected $tableName = '';
	// 实际数据表名（包含表前缀）
	protected $trueTableName ='';
	// 最近错误信息
	protected $error = '';
	// 字段信息
	protected $fields = array();
	// 数据信息
	protected $data =   array();
	// 查询表达式参数
	protected $options  =   array();
	protected $_validate       = array();  // 自动验证定义
	protected $_auto           = array();  // 自动完成定义
	// 是否自动检测数据表字段信息
	protected $autoCheckFields   =   true;
	// 是否批处理验证
	protected $patchValidate   =  false;

	/**
	 +----------------------------------------------------------
	 * 架构函数
	 * 取得DB类的实例对象 字段检查
	 +----------------------------------------------------------
	 * @param string $name 模型名称
	 * @param string $tablePrefix 表前缀
	 * @param mixed $connection 数据库连接信息
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 */
	public function __construct($name='',$tablePrefix='',$connection='') {
		// 模型初始化
		$this->_initialize();
		// 获取模型名称
		if(!empty($name)) {
			if(strpos($name,'.')) { // 支持 数据库名.模型名的 定义
				list($this->dbName,$this->name) = explode('.',$name);
			}else{
				$this->name   =  $name;
			}
		}elseif(empty($this->name)){
			$this->name =   $this->getModelName();
		}
		if(!empty($tablePrefix)) {
			$this->tablePrefix =  $tablePrefix;
		}
		// 设置表前缀
		$this->tablePrefix = $this->tablePrefix?$this->tablePrefix:C('DB_PREFIX');
		// 数据库初始化操作
		// 获取数据库操作对象
		// 当前模型有独立的数据库连接信息
		$this->db(0,empty($this->connection)?$connection:$this->connection);
		// 字段检测
		if(!empty($this->name) && $this->autoCheckFields)    $this->_checkTableInfo();
	}

	/**
	 +----------------------------------------------------------
	 * 自动检测数据表信息
	 +----------------------------------------------------------
	 * @access protected
	 +----------------------------------------------------------
	 * @return void
	 +----------------------------------------------------------
	 */
	protected function _checkTableInfo() {
		// 如果不是Model类 自动记录数据表信息
		// 只在第一次执行记录
		if(empty($this->fields)) {
			// 如果数据表字段没有定义则自动获取
			if(C('DB_FIELDS_CACHE')) {
				$db   =  $this->dbName?$this->dbName:C('DB_NAME');
				$this->fields = F('_fields/'.$db.'.'.$this->name);
				if(!$this->fields)   $this->flush();
			}else{
				// 每次都会读取数据表信息
				$this->flush();
			}
		}
	}

	/**
	 +----------------------------------------------------------
	 * 获取字段信息并缓存
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @return void
	 +----------------------------------------------------------
	 */
	public function flush() {
		// 缓存不存在则查询数据表信息
		$fields =   $this->db->getFields($this->getTableName());
		if(!$fields) { // 无法获取字段信息
			return false;
		}
		$this->fields   =   array_keys($fields);
		$this->fields['_autoinc'] = false;
		foreach ($fields as $key=>$val){
			// 记录字段类型
			$type[$key]    =   $val['type'];
			if($val['primary']) {
				$this->fields['_pk'] = $key;
				if($val['autoinc']) $this->fields['_autoinc']   =   true;
			}
		}
		// 记录字段类型信息
		if(C('DB_FIELDTYPE_CHECK'))   $this->fields['_type'] =  $type;

		// 2008-3-7 增加缓存开关控制
		if(C('DB_FIELDS_CACHE')){
			// 永久缓存数据表信息
			$db   =  $this->dbName?$this->dbName:C('DB_NAME');
			F('_fields/'.$db.'.'.$this->name,$this->fields);
		}
	}

	/**
	 +----------------------------------------------------------
	 * 设置数据对象的值
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param string $name 名称
	 * @param mixed $value 值
	 +----------------------------------------------------------
	 * @return void
	 +----------------------------------------------------------
	 */
	public function __set($name,$value) {
		// 设置数据对象属性
		$this->data[$name]  =   $value;
	}

	/**
	 +----------------------------------------------------------
	 * 获取数据对象的值
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param string $name 名称
	 +----------------------------------------------------------
	 * @return mixed
	 +----------------------------------------------------------
	 */
	public function __get($name) {
		return isset($this->data[$name])?$this->data[$name]:null;
	}

	/**
	 +----------------------------------------------------------
	 * 检测数据对象的值
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param string $name 名称
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	public function __isset($name) {
		return isset($this->data[$name]);
	}

	/**
	 +----------------------------------------------------------
	 * 销毁数据对象的值
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param string $name 名称
	 +----------------------------------------------------------
	 * @return void
	 +----------------------------------------------------------
	 */
	public function __unset($name) {
		unset($this->data[$name]);
	}

	/**
	 +----------------------------------------------------------
	 * 利用__call方法实现一些特殊的Model方法
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param string $method 方法名称
	 * @param array $args 调用参数
	 +----------------------------------------------------------
	 * @return mixed
	 +----------------------------------------------------------
	 */
	public function __call($method,$args) {
		if(in_array(strtolower($method),array('table','where','order','limit','page','alias','having','group','lock','distinct'),true)) {
			// 连贯操作的实现
			$this->options[strtolower($method)] =   $args[0];
			return $this;
		}elseif(in_array(strtolower($method),array('count','sum','min','max','avg'),true)){
			// 统计查询的实现
			$field =  isset($args[0])?$args[0]:'*';
			return $this->getField(strtoupper($method).'('.$field.') AS tp_'.$method);
		}elseif(strtolower(substr($method,0,5))=='getby') {
			// 根据某个字段获取记录
			$field   =   parse_name(substr($method,5));
			$where[$field] =  $args[0];
			return $this->where($where)->find();
		}else{
			throw_exception(__CLASS__.':'.$method.L('_METHOD_NOT_EXIST_'));
			return;
		}
	}
	// 回调方法 初始化模型
	protected function _initialize() {}

	/**
	 +----------------------------------------------------------
	 * 对保存到数据库的数据进行处理
	 +----------------------------------------------------------
	 * @access protected
	 +----------------------------------------------------------
	 * @param mixed $data 要操作的数据
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	protected function _facade($data) {
		// 检查非数据字段
		if(!empty($this->fields)) {
			foreach ($data as $key=>$val){
				if(!in_array($key,$this->fields,true)){
					unset($data[$key]);
				}elseif(C('DB_FIELDTYPE_CHECK') && is_scalar($val)) {
					// 字段类型检查
					$this->_parseType($data,$key);
				}
			}
		}
		return $data;
	}

	/**
	 +----------------------------------------------------------
	 * 新增数据
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param mixed $data 数据
	 * @param array $options 表达式
	 +----------------------------------------------------------
	 * @return mixed
	 +----------------------------------------------------------
	 */
	public function add($data='',$options=array()) {
		if(empty($data)) {
			// 没有传递数据，获取当前数据对象的值
			if(!empty($this->data)) {
				$data    =   $this->data;
			}else{
				$this->error = L('_DATA_TYPE_INVALID_');
				return false;
			}
		}
		// 分析表达式
		$options =  $this->_parseOptions($options);
		// 数据处理
		$data = $this->_facade($data);
		// 写入数据到数据库
		$result = $this->db->insert($data,$options);
		if(false !== $result ) {
			$insertId   =   $this->getLastInsID();
			if($insertId) {
				// 自增主键返回插入ID
				return $insertId;
			}
		}
		return $result;
	}

	/**
	 +----------------------------------------------------------
	 * 保存数据
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param mixed $data 数据
	 * @param array $options 表达式
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	public function save($data='',$options=array()) {
		if(empty($data)) {
			// 没有传递数据，获取当前数据对象的值
			if(!empty($this->data)) {
				$data    =   $this->data;
			}else{
				$this->error = L('_DATA_TYPE_INVALID_');
				return false;
			}
		}
		// 数据处理
		$data = $this->_facade($data);
		// 分析表达式
		$options =  $this->_parseOptions($options);
		if(!isset($options['where']) ) {
			// 如果存在主键数据 则自动作为更新条件
			if(isset($data[$this->getPk()])) {
				$pk   =  $this->getPk();
				$where[$pk]   =  $data[$pk];
				$options['where']  =  $where;
				unset($data[$pk]);
			}else{
				// 如果没有任何更新条件则不执行
				$this->error = L('_OPERATION_WRONG_');
				return false;
			}
		}
		$result = $this->db->update($data,$options);
		return $result;
	}

	/**
	 +----------------------------------------------------------
	 * 删除数据
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param mixed $options 表达式
	 +----------------------------------------------------------
	 * @return mixed
	 +----------------------------------------------------------
	 */
	public function delete($options=array()) {
		if(empty($options) && empty($this->options['where'])) {
			// 如果删除条件为空 则删除当前数据对象所对应的记录
			if(!empty($this->data) && isset($this->data[$this->getPk()]))
			return $this->delete($this->data[$this->getPk()]);
			else
			return false;
		}
		if(is_numeric($options)  || is_string($options)) {
			// 根据主键删除记录
			$pk   =  $this->getPk();
			if(strpos($options,',')) {
				$where[$pk]   =  array('IN', $options);
			}else{
				$where[$pk]   =  $options;
				$pkValue = $options;
			}
			$options =  array();
			$options['where'] =  $where;
		}
		// 分析表达式
		$options =  $this->_parseOptions($options);
		$result=    $this->db->delete($options);
		// 返回删除记录个数
		return $result;
	}

	/**
	 +----------------------------------------------------------
	 * 查询数据集
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param array $options 表达式参数
	 +----------------------------------------------------------
	 * @return mixed
	 +----------------------------------------------------------
	 */
	public function select($options=array()) {
		if(is_string($options) || is_numeric($options)) {
			// 根据主键查询
			$pk   =  $this->getPk();
			if(strpos($options,',')) {
				$where[$pk] =  array('IN',$options);
			}else{
				$where[$pk]   =  $options;
			}
			$options =  array();
			$options['where'] =  $where;
		}
		// 分析表达式
		$options =  $this->_parseOptions($options);
		$resultSet = $this->db->select($options);
		if(false === $resultSet) {
			return false;
		}
		if(empty($resultSet)) { // 查询结果为空
			return null;
		}
		return $resultSet;
	}

	/**
	 +----------------------------------------------------------
	 * 分析表达式
	 +----------------------------------------------------------
	 * @access proteced
	 +----------------------------------------------------------
	 * @param array $options 表达式参数
	 +----------------------------------------------------------
	 * @return array
	 +----------------------------------------------------------
	 */
	protected function _parseOptions($options=array()) {
		if(is_array($options))
		$options =  array_merge($this->options,$options);
		// 查询过后清空sql表达式组装 避免影响下次查询
		$this->options  =   array();
		if(!isset($options['table']))
		// 自动获取表名
		$options['table'] =$this->getTableName();
		if(!empty($options['alias'])) {
			$options['table']   .= ' '.$options['alias'];
		}
		// 字段类型验证
		if(C('DB_FIELDTYPE_CHECK')) {
			if(isset($options['where']) && is_array($options['where'])) {
				// 对数组查询条件进行字段类型检查
				foreach ($options['where'] as $key=>$val){
					if(in_array($key,$this->fields,true) && is_scalar($val)){
						$this->_parseType($options['where'],$key);
					}
				}
			}
		}
		return $options;
	}

	/**
	 +----------------------------------------------------------
	 * 数据类型检测
	 +----------------------------------------------------------
	 * @access protected
	 +----------------------------------------------------------
	 * @param mixed $data 数据
	 * @param string $key 字段名
	 +----------------------------------------------------------
	 * @return void
	 +----------------------------------------------------------
	 */
	protected function _parseType(&$data,$key) {
		$fieldType = strtolower($this->fields['_type'][$key]);
		if(false !== strpos($fieldType,'int')) {
			$data[$key]   =  intval($data[$key]);
		}elseif(false !== strpos($fieldType,'float') || false !== strpos($fieldType,'double')){
			$data[$key]   =  floatval($data[$key]);
		}elseif(false !== strpos($fieldType,'bool')){
			$data[$key]   =  (bool)$data[$key];
		}
	}

	/**
	 +----------------------------------------------------------
	 * 查询数据
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param mixed $options 表达式参数
	 +----------------------------------------------------------
	 * @return mixed
	 +----------------------------------------------------------
	 */
	public function find($options=array()) {
		if(is_numeric($options) || is_string($options)) {
			$where[$this->getPk()] =$options;
			$options = array();
			$options['where'] = $where;
		}
		// 总是查找一条记录
		$options['limit'] = 1;
		// 分析表达式
		$options =  $this->_parseOptions($options);
		$resultSet = $this->db->select($options);
		if(false === $resultSet) {
			return false;
		}
		if(empty($resultSet)) {// 查询结果为空
			return null;
		}
		$this->data = $resultSet[0];
		return $this->data;
	}

	/**
	 +----------------------------------------------------------
	 * 设置记录的某个字段值
	 * 支持使用数据库字段和方法
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param string|array $field  字段名
	 * @param string|array $value  字段值
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	public function setField($field,$value) {
		if(is_array($field)) {
			$data = $field;
		}else{
			$data[$field]   =  $value;
		}
		return $this->save($data);
	}

	/**
	 +----------------------------------------------------------
	 * 字段值增长
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param string $field  字段名
	 * @param integer $step  增长值
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	public function setInc($field,$step=1) {
		return $this->setField($field,array('exp',$field.'+'.$step));
	}

	/**
	 +----------------------------------------------------------
	 * 字段值减少
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param string $field  字段名
	 * @param integer $step  减少值
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	public function setDec($field,$step=1) {
		return $this->setField($field,array('exp',$field.'-'.$step));
	}

	/**
	 +----------------------------------------------------------
	 * 获取一条记录的某个字段值
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param string $field  字段名
	 * @param string $spea  字段数据间隔符号
	 +----------------------------------------------------------
	 * @return mixed
	 +----------------------------------------------------------
	 */
	public function getField($field,$sepa=null) {
		$options['field']    =  $field;
		$options =  $this->_parseOptions($options);
		if(strpos($field,',')) { // 多字段
			$resultSet = $this->db->select($options);
			if(!empty($resultSet)) {
				$_field = explode(',', $field);
				$field  = array_keys($resultSet[0]);
				$move   =  $_field[0]==$_field[1]?false:true;
				$key =  array_shift($field);
				$key2 = array_shift($field);
				$cols   =   array();
				$count  =   count($_field);
				foreach ($resultSet as $result){
					$name   =  $result[$key];
					if($move) { // 删除键值记录
						unset($result[$key]);
					}
					if(2==$count) {
						$cols[$name]   =  $result[$key2];
					}else{
						$cols[$name]   =  is_null($sepa)?$result:implode($sepa,$result);
					}
				}
				return $cols;
			}
		}else{   // 查找一条记录
			$options['limit'] = 1;
			$result = $this->db->select($options);
			if(!empty($result)) {
				return reset($result[0]);
			}
		}
		return null;
	}

	/**
	 +----------------------------------------------------------
	 * 创建数据对象 但不保存到数据库
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param mixed $data 创建数据
	 * @param string $type 状态
	 +----------------------------------------------------------
	 * @return mixed
	 +----------------------------------------------------------
	 */
	public function create($data='',$type='') {
		// 如果没有传值默认取POST数据
		if(empty($data)) {
			$data    =   $_POST;
		}elseif(is_object($data)){
			$data   =   get_object_vars($data);
		}
		// 验证数据
		if(empty($data) || !is_array($data)) {
			$this->error = L('_DATA_TYPE_INVALID_');
			return false;
		}

		// 状态
		$type = $type?$type:(!empty($data[$this->getPk()])?self::MODEL_UPDATE:self::MODEL_INSERT);

		// 数据自动验证
		if(!$this->autoValidation($data,$type)) return false;

		// 验证完成生成数据对象
		if($this->autoCheckFields) { // 开启字段检测 则过滤非法字段数据
			$vo   =  array();
			foreach ($this->fields as $key=>$name){
				if(substr($key,0,1)=='_') continue;
				$val = isset($data[$name])?$data[$name]:null;
				//保证赋值有效
				if(!is_null($val)){
					$vo[$name] = (MAGIC_QUOTES_GPC && is_string($val))?   stripslashes($val)  :  $val;
				}
			}
		}else{
			$vo   =  $data;
		}

		// 创建完成对数据进行自动处理
		$this->autoOperation($vo,$type);
		// 赋值当前数据对象
		$this->data =   $vo;
		// 返回创建的数据以供其他调用
		return $vo;
	}

	/**
	 +----------------------------------------------------------
	 * 使用正则验证数据
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param string $value  要验证的数据
	 * @param string $rule 验证规则
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	public function regex($value,$rule) {
		$validate = array(
            'require'=> '/.+/',
            'email' => '/^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/',
            'url' => '/^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$/',
            'currency' => '/^\d+(\.\d+)?$/',
            'number' => '/^\d+$/',
            'zip' => '/^[1-9]\d{5}$/',
            'integer' => '/^[-\+]?\d+$/',
            'double' => '/^[-\+]?\d+(\.\d+)?$/',
            'english' => '/^[A-Za-z]+$/',
		);
		// 检查是否有内置的正则表达式
		if(isset($validate[strtolower($rule)]))
		$rule   =   $validate[strtolower($rule)];
		return preg_match($rule,$value)===1;
	}

	/**
	 +----------------------------------------------------------
	 * 自动表单处理
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param array $data 创建数据
	 * @param string $type 创建类型
	 +----------------------------------------------------------
	 * @return mixed
	 +----------------------------------------------------------
	 */
	private function autoOperation(&$data,$type) {
		// 自动填充
		if(!empty($this->_auto)) {
			foreach ($this->_auto as $auto){
				// 填充因子定义格式
				// array('field','填充内容','填充条件','附加规则',[额外参数])
				if(empty($auto[2])) $auto[2] = self::MODEL_INSERT; // 默认为新增的时候自动填充
				if( $type == $auto[2] || $auto[2] == self::MODEL_BOTH) {
					switch($auto[3]) {
						case 'function':    //  使用函数进行填充 字段的值作为参数
						case 'callback': // 使用回调方法
							$args = isset($auto[4])?$auto[4]:array();
							if(isset($data[$auto[0]])) {
								array_unshift($args,$data[$auto[0]]);
							}
							if('function'==$auto[3]) {
								$data[$auto[0]]  = call_user_func_array($auto[1], $args);
							}else{
								$data[$auto[0]]  =  call_user_func_array(array(&$this,$auto[1]), $args);
							}
							break;
						case 'field':    // 用其它字段的值进行填充
							$data[$auto[0]] = $data[$auto[1]];
							break;
						case 'string':
						default: // 默认作为字符串填充
							$data[$auto[0]] = $auto[1];
					}
					if(false === $data[$auto[0]] )   unset($data[$auto[0]]);
				}
			}
		}
		return $data;
	}

	/**
	 +----------------------------------------------------------
	 * 自动表单验证
	 +----------------------------------------------------------
	 * @access protected
	 +----------------------------------------------------------
	 * @param array $data 创建数据
	 * @param string $type 创建类型
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	protected function autoValidation($data,$type) {
		// 属性验证
		if(!empty($this->_validate)) { // 如果设置了数据自动验证则进行数据验证
			if($this->patchValidate) { // 重置验证错误信息
				$this->error = array();
			}
			foreach($this->_validate as $key=>$val) {
				// 验证因子定义格式
				// array(field,rule,message,condition,type,when,params)
				// 判断是否需要执行验证
				if(empty($val[5]) || $val[5]== self::MODEL_BOTH || $val[5]== $type ) {
					if(0==strpos($val[2],'{%') && strpos($val[2],'}'))
					// 支持提示信息的多语言 使用 {%语言定义} 方式
					$val[2]  =  L(substr($val[2],2,-1));
					$val[3]  =  isset($val[3])?$val[3]:self::EXISTS_VAILIDATE;
					$val[4]  =  isset($val[4])?$val[4]:'regex';
					// 判断验证条件
					switch($val[3]) {
						case self::MUST_VALIDATE:   // 必须验证 不管表单是否有设置该字段
							if(false === $this->_validationField($data,$val))
							return false;
							break;
						case self::VALUE_VAILIDATE:    // 值不为空的时候才验证
							if('' != trim($data[$val[0]]))
							if(false === $this->_validationField($data,$val))
							return false;
							break;
						default:    // 默认表单存在该字段就验证
							if(isset($data[$val[0]]))
							if(false === $this->_validationField($data,$val))
							return false;
					}
				}
			}
			// 批量验证的时候最后返回错误
			if(!empty($this->error)) return false;
		}
		return true;
	}

	/**
	 +----------------------------------------------------------
	 * 验证表单字段 支持批量验证
	 * 如果批量验证返回错误的数组信息
	 +----------------------------------------------------------
	 * @access protected
	 +----------------------------------------------------------
	 * @param array $data 创建数据
	 * @param array $val 验证因子
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	protected function _validationField($data,$val) {
		if(false === $this->_validationFieldItem($data,$val)){
			if($this->patchValidate) {
				$this->error[$val[0]]  =  $val[2];
			}else{
				$this->error    =   $val[2];
				return false;
			}
		}
		return ;
	}

	/**
	 +----------------------------------------------------------
	 * 根据验证因子验证字段
	 +----------------------------------------------------------
	 * @access protected
	 +----------------------------------------------------------
	 * @param array $data 创建数据
	 * @param array $val 验证因子
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	protected function _validationFieldItem($data,$val) {
		switch($val[4]) {
			case 'function':// 使用函数进行验证
			case 'callback':// 调用方法进行验证
				$args = isset($val[6])?$val[6]:array();
				array_unshift($args,$data[$val[0]]);
				if('function'==$val[4]) {
					return call_user_func_array($val[1], $args);
				}else{
					return call_user_func_array(array(&$this, $val[1]), $args);
				}
			case 'confirm': // 验证两个字段是否相同
				return $data[$val[0]] == $data[$val[1]];
			case 'unique': // 验证某个值是否唯一
				if(is_string($val[0]) && strpos($val[0],','))
				$val[0]  =  explode(',',$val[0]);
				$map = array();
				if(is_array($val[0])) {
					// 支持多个字段验证
					foreach ($val[0] as $field)
					$map[$field]   =  $data[$field];
				}else{
					$map[$val[0]] = $data[$val[0]];
				}
				if(!empty($data[$this->getPk()])) { // 完善编辑的时候验证唯一
					$map[$this->getPk()] = array('neq',$data[$this->getPk()]);
				}
				if($this->where($map)->find())   return false;
				return true;
			default:  // 检查附加规则
				return $this->check($data[$val[0]],$val[1],$val[4]);
		}
	}

	/**
	 +----------------------------------------------------------
	 * 验证数据 支持 in between equal length regex expire ip_allow ip_deny
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param string $value 验证数据
	 * @param mixed $rule 验证表达式
	 * @param string $type 验证方式 默认为正则验证
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	public function check($value,$rule,$type='regex'){
		switch(strtolower($type)) {
			case 'in': // 验证是否在某个指定范围之内 逗号分隔字符串或者数组
				$range   = is_array($rule)?$rule:explode(',',$rule);
				return in_array($value ,$range);
			case 'between': // 验证是否在某个范围
				list($min,$max)   =  explode(',',$rule);
				return $value>=$min && $value<=$max;
			case 'equal': // 验证是否等于某个值
				return $value == $rule;
			case 'length': // 验证长度
				$length  =  mb_strlen($value,'utf-8'); // 当前数据长度
				if(strpos($rule,',')) { // 长度区间
					list($min,$max)   =  explode(',',$rule);
					return $length >= $min && $length <= $max;
				}else{// 指定长度
					return $length == $rule;
				}
			case 'expire':
				list($start,$end)   =  explode(',',$rule);
				if(!is_numeric($start)) $start   =  strtotime($start);
				if(!is_numeric($end)) $end   =  strtotime($end);
				return $_SERVER['REQUEST_TIME'] >= $start && $_SERVER['REQUEST_TIME'] <= $end;
			case 'ip_allow': // IP 操作许可验证
				return in_array(get_client_ip(),explode(',',$rule));
			case 'ip_deny': // IP 操作禁止验证
				return !in_array(get_client_ip(),explode(',',$rule));
			case 'regex':
			default:    // 默认使用正则验证 可以使用验证类中定义的验证名称
				// 检查附加规则
				return $this->regex($value,$rule);
		}
	}

	/**
	 +----------------------------------------------------------
	 * SQL查询
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param mixed $sql  SQL指令
	 +----------------------------------------------------------
	 * @return mixed
	 +----------------------------------------------------------
	 */
	public function query($sql) {
		if(!empty($sql)) {
			if(strpos($sql,'__TABLE__'))
			$sql    =   str_replace('__TABLE__',$this->getTableName(),$sql);
			return $this->db->query($sql);
		}else{
			return false;
		}
	}

	/**
	 +----------------------------------------------------------
	 * 执行SQL语句
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param string $sql  SQL指令
	 +----------------------------------------------------------
	 * @return false | integer
	 +----------------------------------------------------------
	 */
	public function execute($sql) {
		if(!empty($sql)) {
			if(strpos($sql,'__TABLE__'))
			$sql    =   str_replace('__TABLE__',$this->getTableName(),$sql);
			return $this->db->execute($sql);
		}else {
			return false;
		}
	}

	/**
	 +----------------------------------------------------------
	 * 切换当前的数据库连接
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param integer $linkNum  连接序号
	 * @param mixed $config  数据库连接信息
	 * @param array $params  模型参数
	 +----------------------------------------------------------
	 * @return Model
	 +----------------------------------------------------------
	 */
	public function db($linkNum,$config='',$params=array()){
		static $_db = array();
		if(!isset($_db[$linkNum])) {
			// 创建一个新的实例
			if(!empty($config) && false === strpos($config,'/')) { // 支持读取配置参数
				$config  =  C($config);
			}
			$_db[$linkNum]            =    Db::getInstance($config);
		}elseif(NULL === $config){
			$_db[$linkNum]->close(); // 关闭数据库连接
			unset($_db[$linkNum]);
			return ;
		}
		if(!empty($params)) {
			if(is_string($params))    parse_str($params,$params);
			foreach ($params as $name=>$value){
				$this->setProperty($name,$value);
			}
		}
		// 切换数据库连接
		$this->db   =    $_db[$linkNum];
		return $this;
	}

	/**
	 +----------------------------------------------------------
	 * 得到当前的数据对象名称
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @return string
	 +----------------------------------------------------------
	 */
	public function getModelName() {
		if(empty($this->name))
		$this->name =   substr(get_class($this),0,-5);
		return $this->name;
	}

	/**
	 +----------------------------------------------------------
	 * 得到完整的数据表名
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @return string
	 +----------------------------------------------------------
	 */
	public function getTableName() {
		if(empty($this->trueTableName)) {
			$tableName  = !empty($this->tablePrefix) ? $this->tablePrefix : '';
			if(!empty($this->tableName)) {
				$tableName .= $this->tableName;
			}else{
				$tableName .= parse_name($this->name);
			}
			$this->trueTableName    =   strtolower($tableName);
		}
		return (!empty($this->dbName)?$this->dbName.'.':'').$this->trueTableName;
	}

	/**
	 +----------------------------------------------------------
	 * 启动事务
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @return void
	 +----------------------------------------------------------
	 */
	public function startTrans() {
		$this->commit();
		$this->db->startTrans();
		return ;
	}

	/**
	 +----------------------------------------------------------
	 * 提交事务
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	public function commit() {
		return $this->db->commit();
	}

	/**
	 +----------------------------------------------------------
	 * 事务回滚
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	public function rollback() {
		return $this->db->rollback();
	}

	/**
	 +----------------------------------------------------------
	 * 返回模型的错误信息
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @return string
	 +----------------------------------------------------------
	 */
	public function getError() {
		return $this->error;
	}

	/**
	 +----------------------------------------------------------
	 * 返回数据库的错误信息
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @return string
	 +----------------------------------------------------------
	 */
	public function getDbError() {
		return $this->db->getError();
	}

	/**
	 +----------------------------------------------------------
	 * 返回最后插入的ID
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @return string
	 +----------------------------------------------------------
	 */
	public function getLastInsID() {
		return $this->db->getLastInsID();
	}

	/**
	 +----------------------------------------------------------
	 * 返回最后执行的sql语句
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @return string
	 +----------------------------------------------------------
	 */
	public function getLastSql() {
		return $this->db->getLastSql();
	}
	// 鉴于getLastSql比较常用 增加_sql 别名
	public function _sql(){
		return $this->getLastSql();
	}

	/**
	 +----------------------------------------------------------
	 * 获取主键名称
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @return string
	 +----------------------------------------------------------
	 */
	public function getPk() {
		return isset($this->fields['_pk'])?$this->fields['_pk']:$this->pk;
	}

	/**
	 +----------------------------------------------------------
	 * 获取数据表字段信息
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @return array
	 +----------------------------------------------------------
	 */
	public function getDbFields(){
		if($this->fields) {
			$fields   =  $this->fields;
			unset($fields['_autoinc'],$fields['_pk'],$fields['_type']);
			return $fields;
		}
		return false;
	}

	/**
	 +----------------------------------------------------------
	 * 指定查询字段 支持字段排除
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param mixed $field
	 * @param boolean $except 是否排除
	 +----------------------------------------------------------
	 * @return Model
	 +----------------------------------------------------------
	 */
	public function field($field,$except=false){
		if($except) {// 字段排除
			if(is_string($field)) {
				$field =  explode(',',$field);
			}
			$fields   =  $this->getDbFields();
			$field =  $fields?array_diff($fields,$field):$field;
		}
		$this->options['field']   =   $field;
		return $this;
	}

	/**
	 +----------------------------------------------------------
	 * 设置数据对象值
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param mixed $data 数据
	 +----------------------------------------------------------
	 * @return Model
	 +----------------------------------------------------------
	 */
	public function data($data){
		if(is_object($data)){
			$data   =   get_object_vars($data);
		}elseif(is_string($data)){
			parse_str($data,$data);
		}elseif(!is_array($data)){
			throw_exception(L('_DATA_TYPE_INVALID_'));
		}
		$this->data = $data;
		return $this;
	}

	/**
	 +----------------------------------------------------------
	 * 查询SQL组装 join
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param mixed $join
	 +----------------------------------------------------------
	 * @return Model
	 +----------------------------------------------------------
	 */
	public function join($join) {
		if(is_array($join))
		$this->options['join'] =  $join;
		else
		$this->options['join'][]  =   $join;
		return $this;
	}

	/**
	 +----------------------------------------------------------
	 * 查询SQL组装 union
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param array $union
	 +----------------------------------------------------------
	 * @return Model
	 +----------------------------------------------------------
	 */
	public function union($union) {
		if(empty($union)) return $this;
		// 转换union表达式
		if($union instanceof Model) {
			$options   =  $union->getProperty('options');
			if(!isset($options['table'])){
				// 自动获取表名
				$options['table'] =$union->getTableName();
			}
			if(!isset($options['field'])) {
				$options['field'] =$this->options['field'];
			}
		}elseif(is_object($union)) {
			$options   =  get_object_vars($union);
		}elseif(!is_array($union)){
			throw_exception(L('_DATA_TYPE_INVALID_'));
		}
		$this->options['union'][]  =   $options;
		return $this;
	}

	/**
	 +----------------------------------------------------------
	 * 设置模型的属性值
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param string $name 名称
	 * @param mixed $value 值
	 +----------------------------------------------------------
	 * @return Model
	 +----------------------------------------------------------
	 */
	public function setProperty($name,$value) {
		if(property_exists($this,$name))
		$this->$name = $value;
		return $this;
	}

	/**
	 +----------------------------------------------------------
	 * 获取模型的属性值
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param string $name 名称
	 +----------------------------------------------------------
	 * @return mixed
	 +----------------------------------------------------------
	 */
	public function getProperty($name){
		if(property_exists($this,$name))
		return $this->$name;
		else
		return NULL;
	}
}